Translations:Adventist Youth Honors Answer Book/Nature/Flowers - Advanced/10/en

Some keys are better than others, and some strive to use less technical jargon. If you have difficulty with a key, try a different one. Another thing that distinguishes a good key from a poor one is the number of "road signs" given at a particular juncture. For instance, the key may ask if the plant's fruit is red or blue, and you happen to be examining a plant when at a time when it does not bear fruit. Alternative questions help in situations like this.